ifa_add_loopback_route: insertion failed with ifconfig wlan0 up

[Dominique Goncalves]

Hi,

I've installed FreeBSD 8.2-RELEASE on soekris net4801 with Atheros
9280 (mini pci card) as an access point using hostapd, so far it works
. Sometimes I need to disable wireless with ifconfig wlan0 down but
each times I run ifconfig wlan0 up, the kernel produces this error

ifa_add_loopback_route: insertion failed

is this a problem ? or maybe there is a better way to disable/enable wireless ?

TIA,
Regards.
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Re: 7-STABLE NFS: fatal: "select lock: Permission denied"

[perryh]

Chuck Swiger  wrote:

> People tend to take advantage of the resources they have; if you
> have an EMC or NetApp filer handy, it's might well be reasonable
> to use it ...

s/reasonable/tempting/

"When the only tool you have is a hammer, every problem tends to
resemble a nail."
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Re: Multiple gateways support

[Eir Nym]

On 1 April 2011 21:27, Baginski Darren  wrote:
> Hi!
>
> Could please someone tell me about current state of multiple gw capabilities 
> of FreeBSD?
> I have dual homed FreeBSD box, one interface ISP1 another ISP2 :
> 1) can I balance outgoing traffic across them ?
> 2) Is there support of any kind dead gateway detection?
> 3) Can I install multiple routes to the same network (with same and with 
> different wight)? If yes how it behaves with one link failure, in particular 
> if interface is down?
>
> Thank you!
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>

about multiply GWs: you can set multiply gw via setfib(1) utility and
use fib in your firewall rules. But it is not very handy with DHCP and
rc(8) (setfib is located in /usr/bin and can't be used in /etc/rc.d).
Due to this I have to add another FreeBSD box to handle dynamic
routes.

This is the one thing I know which can I do in linux easily and in
freebsd with hacks.
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Re: ifa_add_loopback_route: insertion failed with ifconfig wlan0 up

[Sergey Kandaurov]

On 6 April 2011 11:35, Dominique Goncalves
 wrote:
> Hi,
>
> I've installed FreeBSD 8.2-RELEASE on soekris net4801 with Atheros
> 9280 (mini pci card) as an access point using hostapd, so far it works
> . Sometimes I need to disable wireless with ifconfig wlan0 down but
> each times I run ifconfig wlan0 up, the kernel produces this error
>
> ifa_add_loopback_route: insertion failed
>
> is this a problem ? or maybe there is a better way to disable/enable wireless 
> ?
>

I see this too with a dumb test:

vlan5: flags=8003 metric 0 mtu 1500
ether 00:00:00:00:00:00
inet6 fe80::21a:64ff:fe68:d005%vlan5 prefixlen 64 scopeid 0xa
inet 192.168.13.13 netmask 0x broadcast 192.168.13.13
nd6 options=3
vlan: 0 parent interface: 

On 8.1 ifconfig vlan5 up gives:
ifa_add_loopback_route: insertion failed

On head ifconfig vlan5 down gives:
interface address is missing from cache = 0  in delete

-- 
wbr,
pluknet
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Re: ifa_add_loopback_route: insertion failed with ifconfig wlan0 up

[Sergey Kandaurov]

On 6 April 2011 15:05, Sergey Kandaurov  wrote:
> On 6 April 2011 11:35, Dominique Goncalves
>  wrote:
>> Hi,
>>
>> I've installed FreeBSD 8.2-RELEASE on soekris net4801 with Atheros
>> 9280 (mini pci card) as an access point using hostapd, so far it works
>> . Sometimes I need to disable wireless with ifconfig wlan0 down but
>> each times I run ifconfig wlan0 up, the kernel produces this error
>>
>> ifa_add_loopback_route: insertion failed
>>
>> is this a problem ? or maybe there is a better way to disable/enable 
>> wireless ?
>>
>
> I see this too with a dumb test:
>
> vlan5: flags=8003 metric 0 mtu 1500
>        ether 00:00:00:00:00:00
>        inet6 fe80::21a:64ff:fe68:d005%vlan5 prefixlen 64 scopeid 0xa
>        inet 192.168.13.13 netmask 0x broadcast 192.168.13.13
>        nd6 options=3
>        vlan: 0 parent interface: 
>
> On 8.1 ifconfig vlan5 up gives:
> ifa_add_loopback_route: insertion failed
>
> On head ifconfig vlan5 down gives:
> interface address is missing from cache = 0  in delete
>

On more thing:
on head ifconfig vlan5 destroy gives:
if_delmulti_ifma: ifnet 0xfe006b38c000 disappeared


-- 
wbr,
pluknet
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Re: Multiple gateways support

[Miroslav Lachman]

Eir Nym wrote:

On 1 April 2011 21:27, Baginski Darren  wrote:

Hi!

Could please someone tell me about current state of multiple gw capabilities of 
FreeBSD?
I have dual homed FreeBSD box, one interface ISP1 another ISP2 :
1) can I balance outgoing traffic across them ?
2) Is there support of any kind dead gateway detection?
3) Can I install multiple routes to the same network (with same and with 
different wight)? If yes how it behaves with one link failure, in particular if 
interface is down?


about multiply GWs: you can set multiply gw via setfib(1) utility and
use fib in your firewall rules. But it is not very handy with DHCP and
rc(8) (setfib is located in /usr/bin and can't be used in /etc/rc.d).
Due to this I have to add another FreeBSD box to handle dynamic
routes.

This is the one thing I know which can I do in linux easily and in
freebsd with hacks.


There were some attempts to add setfib support to rc.subr, but it was 
not committed:

http://www.freebsd.org/cgi/query-pr.cgi?pr=conf/132483

I don't know the reason.

Miroslav Lachman
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Re: Multiple gateways support

[J. Hellenthal]

On Wed, Apr 06, 2011 at 01:45:54PM +0400, Eir Nym wrote:
> On 1 April 2011 21:27, Baginski Darren  wrote:
> > Hi!
> >
> > Could please someone tell me about current state of multiple gw 
> > capabilities of FreeBSD?
> > I have dual homed FreeBSD box, one interface ISP1 another ISP2 :
> > 1) can I balance outgoing traffic across them ?
> > 2) Is there support of any kind dead gateway detection?
> > 3) Can I install multiple routes to the same network (with same and with 
> > different wight)? If yes how it behaves with one link failure, in 
> > particular if interface is down?
> >

From what you said here it seems that your looking for lagg(4) with
configured with the loadbalance option. Give this man page [1] a
thorough read and youll probably see what your looking for.

1) http://www.freebsd.org/cgi/man.cgi?query=lagg


> 
> about multiply GWs: you can set multiply gw via setfib(1) utility and
> use fib in your firewall rules. But it is not very handy with DHCP and
> rc(8) (setfib is located in /usr/bin and can't be used in /etc/rc.d).
> Due to this I have to add another FreeBSD box to handle dynamic
> routes.
> 
> This is the one thing I know which can I do in linux easily and in
> freebsd with hacks.

-- 

  Regards,

  J. Hellenthal
  JJH48-ARIN
  0x89D8547E



pgpGxZXFDIHZk.pgp
Description: PGP signature

Re: Routing enhancement - reduce routing table locking

[Ingo Flaschberger]

Hi,

regarding multipath problems:

Setup which should work:

++  ++
|Router A|(ospf)|Router B|
++  ++
 |(carp)|(carp)
 |  |
 +--+---+
|
   Lan

Router A & B run quagga and exchange routing table.
Router B has during failover of carp a route to lan via ospf/router A and 
a direct connected interface.
Thus FreeBSD carp is not able to handle this correctly, I use a modified 
version of ucarp.


Testsetup:

+-+ (em1)+-+
| FreeBSD |--|Probe|
+-+  +-+

Probe:  10.13.13.95/24
FreeBSD:
em2: 10.11.11.100/24

++ probe answer ping
-- probe does not answer ping

Script:
--- snip ---
ifconfig em1 alias 10.13.13.90/24
ping -c 1 10.13.13.95
++
route add 10.13.13.0/24 10.11.11.1 -weight 2
ping -c 1 10.13.13.95
++
route add 10.13.13.0/24 10.11.11.2 -weight 3
ping -c 1 10.13.13.95
++

route delete 10.13.13.0/24 10.11.11.1
ping -c 1 10.13.13.95
++
route delete 10.13.13.0/24 10.11.11.2
ping -c 1 10.13.13.95
++
ifconfig em1 -alias 10.13.13.90
ping -c 1 10.13.13.95
--

route add 10.13.13.0/24 10.11.11.1 -weight 2
ping -c 1 10.13.13.95
--
ifconfig em1 alias 10.13.13.90/24
ping -c 1 10.13.13.95
++
route add 10.13.13.0/24 10.11.11.2 -weight 3
ping -c 1 10.13.13.95
++
ifconfig em1 -alias 10.13.13.90
ping -c 1 10.13.13.95
--
route delete 10.13.13.0/24 10.11.11.1
ping -c 1 10.13.13.95
--
route delete 10.13.13.0/24 10.11.11.2
ping -c 1 10.13.13.95
--

route add 10.13.13.0/24 10.11.11.1 -weight 2
ping -c 1 10.13.13.95
--
route add 10.13.13.0/24 10.11.11.2 -weight 3
ping -c 1 10.13.13.95
--
ifconfig em1 alias 10.13.13.90/24
ping -c 1 10.13.13.95
++
route delete 10.13.13.0/24 10.11.11.2
ping -c 1 10.13.13.95
++
route delete 10.13.13.0/24 10.11.11.1
ping -c 1 10.13.13.95
++
ifconfig em1 -alias 10.13.13.90
--

route add 10.13.13.0/24 10.11.11.1
ifconfig em1 alias 10.13.13.90/24
ifconfig em1 down
ifconfig em1 up
ifconfig em1 down

ifconfig em1 -alias 10.13.13.90
route delete 10.13.13.0/24 10.11.11.1

ifconfig em1 alias 10.13.13.90/24
route add 10.13.13.0/24 10.11.11.1
ifconfig em1 down
ifconfig em1 up
ifconfig em1 down
--- snap ---

If this script runs without any kernels errors (dmesg), crashes and probe 
replies accordingly - then everything is alright.


Mit freundlichen Gruessen,
Ingo Flaschberger

Geschaeftsleitung

crossip communications gmbh
A-1020 Wien, Sebastian Kneipp Gasse 1/3

Sitz der Gesellschaft: 1020 Wien, Oesterreich
Firmenbuchgericht: Handelsgericht Wien, FN 269698 s,
Umsatzsteueridentifikationsnummer (UID): ATU62080367

Haftungsausschluss / Disclaimer 
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Re: Multiple gateways support

[Michael Proto]

On Wed, Apr 6, 2011 at 8:02 AM, J. Hellenthal  wrote:
> On Wed, Apr 06, 2011 at 01:45:54PM +0400, Eir Nym wrote:
>> On 1 April 2011 21:27, Baginski Darren  wrote:
>> > Hi!
>> >
>> > Could please someone tell me about current state of multiple gw 
>> > capabilities of FreeBSD?
>> > I have dual homed FreeBSD box, one interface ISP1 another ISP2 :
>> > 1) can I balance outgoing traffic across them ?
>> > 2) Is there support of any kind dead gateway detection?
>> > 3) Can I install multiple routes to the same network (with same and with 
>> > different wight)? If yes how it behaves with one link failure, in 
>> > particular if interface is down?
>> >
>
> From what you said here it seems that your looking for lagg(4) with
> configured with the loadbalance option. Give this man page [1] a
> thorough read and youll probably see what your looking for.
>
> 1) http://www.freebsd.org/cgi/man.cgi?query=lagg
>
>
>>
>> about multiply GWs: you can set multiply gw via setfib(1) utility and
>> use fib in your firewall rules. But it is not very handy with DHCP and
>> rc(8) (setfib is located in /usr/bin and can't be used in /etc/rc.d).
>> Due to this I have to add another FreeBSD box to handle dynamic
>> routes.
>>
>> This is the one thing I know which can I do in linux easily and in
>> freebsd with hacks.
>
> --
>
>  Regards,
>
>  J. Hellenthal
>  JJH48-ARIN
>  0x89D8547E
>
>


I don't think lagg(4) will work here, as its designed for two
interfaces that are attached to the same network (see the example in
the man page). For two different ISPs, I think the setfib approach is
probably the way to go.


-Proto
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Re: kern/153255: [panic] 8.2-PRERELEASE repeatable kernel panic under heavy network load

[Eugene Grosbein]

The following reply was made to PR kern/153255; it has been noted by GNATS.

From: Eugene Grosbein 
To: bug-follo...@freebsd.org
Cc: Gleb Smirnoff 
Subject: Re: kern/153255: [panic] 8.2-PRERELEASE repeatable kernel panic under
 heavy network load
Date: Wed, 06 Apr 2011 21:40:29 +0700

 Hi!
 
 I have been testing some patches produced be Gleb Smirnoff (glebius)
 during several weeks already. These patches, one for ng_base.c [1]
 and another one for if.c [2] have eliminated my panics competely
 and now all five my routers run perfectly stable.
 
 Now I see they hit HEAD. Please perform MFC and close this PR.
 
 [1] http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/netgraph/ng_base.c#rev1.185
 [2] http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/net/if.c#rev1.399
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kern/153671: [em] [panic] 8.2-PRERELEASE repeatable kernel in if_em(4)

[Eugene Grosbein]

The following reply was made to PR kern/153671; it has been noted by GNATS.

From: Eugene Grosbein 
To: bug-follo...@freebsd.org
Cc: Gleb Smirnoff 
Subject: kern/153671: [em] [panic] 8.2-PRERELEASE repeatable kernel in if_em(4)
Date: Wed, 06 Apr 2011 21:41:07 +0700

 Hi!
 
 I have been testing some patches produced be Gleb Smirnoff (glebius)
 during several weeks already. These patches, one for ng_base.c [1]
 and another one for if.c [2] have eliminated my panics competely
 and now all five my routers run perfectly stable.
 
 Now I see they hit HEAD. Please perform MFC and close this PR.
 
 [1] http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/netgraph/ng_base.c#rev1.185
 [2] http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/net/if.c#rev1.399
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Re: Multiple gateways support

[Nikolay Denev]

On Apr 6, 2011, at 5:36 PM, Michael Proto wrote:

> On Wed, Apr 6, 2011 at 8:02 AM, J. Hellenthal  wrote:
>> On Wed, Apr 06, 2011 at 01:45:54PM +0400, Eir Nym wrote:
>>> On 1 April 2011 21:27, Baginski Darren  wrote:
 Hi!
 
 Could please someone tell me about current state of multiple gw 
 capabilities of FreeBSD?
 I have dual homed FreeBSD box, one interface ISP1 another ISP2 :
 1) can I balance outgoing traffic across them ?
 2) Is there support of any kind dead gateway detection?
 3) Can I install multiple routes to the same network (with same and with 
 different wight)? If yes how it behaves with one link failure, in 
 particular if interface is down?
 
>> 
>> From what you said here it seems that your looking for lagg(4) with
>> configured with the loadbalance option. Give this man page [1] a
>> thorough read and youll probably see what your looking for.
>> 
>> 1) http://www.freebsd.org/cgi/man.cgi?query=lagg
>> 
>> 
>>> 
>>> about multiply GWs: you can set multiply gw via setfib(1) utility and
>>> use fib in your firewall rules. But it is not very handy with DHCP and
>>> rc(8) (setfib is located in /usr/bin and can't be used in /etc/rc.d).
>>> Due to this I have to add another FreeBSD box to handle dynamic
>>> routes.
>>> 
>>> This is the one thing I know which can I do in linux easily and in
>>> freebsd with hacks.
>> 
>> --
>> 
>>  Regards,
>> 
>>  J. Hellenthal
>>  JJH48-ARIN
>>  0x89D8547E
>> 
>> 
> 
> 
> I don't think lagg(4) will work here, as its designed for two
> interfaces that are attached to the same network (see the example in
> the man page). For two different ISPs, I think the setfib approach is
> probably the way to go.
> 
> 
> -Proto
> 

Actually I think the OP is asking about the "options RADIX_MPATH" feature.

1) Yes, It can balance over the two links but only using Modulo-N Hash 
(RFC2991) algorithm, and probably you should setup NAT on both links.
2) AFAIK there is no dead gw detection code yet.
3) Yes you can do that. There were some fixes for handling interfaces with 
no-link but I was not able to see it working in my setup. e.g. the host still 
tries to send traffic to a interface with no link, effectively blackholing the 
traffic (this was tested on a soekris box with if_vr(4))

IMHO the whole RADIX_MPATH stuff is still in experimental stage and needs some 
more work to work correctly.

There is a recent thread about some improvements in RADIX_MPATH.

Regards,
Nikolay

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Re: Multiple gateways support

[K. Macy]

The weights of the links can be changed at run time. If one link is
not passing traffic its weight should be set to zero until such time
as it is passing traffic again.

On Wed, Apr 6, 2011 at 6:13 PM, Nikolay Denev  wrote:
> On Apr 6, 2011, at 5:36 PM, Michael Proto wrote:
>
>> On Wed, Apr 6, 2011 at 8:02 AM, J. Hellenthal  wrote:
>>> On Wed, Apr 06, 2011 at 01:45:54PM +0400, Eir Nym wrote:
 On 1 April 2011 21:27, Baginski Darren  wrote:
> Hi!
>
> Could please someone tell me about current state of multiple gw 
> capabilities of FreeBSD?
> I have dual homed FreeBSD box, one interface ISP1 another ISP2 :
> 1) can I balance outgoing traffic across them ?
> 2) Is there support of any kind dead gateway detection?
> 3) Can I install multiple routes to the same network (with same and with 
> different wight)? If yes how it behaves with one link failure, in 
> particular if interface is down?
>
>>>
>>> From what you said here it seems that your looking for lagg(4) with
>>> configured with the loadbalance option. Give this man page [1] a
>>> thorough read and youll probably see what your looking for.
>>>
>>> 1) http://www.freebsd.org/cgi/man.cgi?query=lagg
>>>
>>>

 about multiply GWs: you can set multiply gw via setfib(1) utility and
 use fib in your firewall rules. But it is not very handy with DHCP and
 rc(8) (setfib is located in /usr/bin and can't be used in /etc/rc.d).
 Due to this I have to add another FreeBSD box to handle dynamic
 routes.

 This is the one thing I know which can I do in linux easily and in
 freebsd with hacks.
>>>
>>> --
>>>
>>>  Regards,
>>>
>>>  J. Hellenthal
>>>  JJH48-ARIN
>>>  0x89D8547E
>>>
>>>
>>
>>
>> I don't think lagg(4) will work here, as its designed for two
>> interfaces that are attached to the same network (see the example in
>> the man page). For two different ISPs, I think the setfib approach is
>> probably the way to go.
>>
>>
>> -Proto
>>
>
> Actually I think the OP is asking about the "options RADIX_MPATH" feature.
>
> 1) Yes, It can balance over the two links but only using Modulo-N Hash 
> (RFC2991) algorithm, and probably you should setup NAT on both links.
> 2) AFAIK there is no dead gw detection code yet.
> 3) Yes you can do that. There were some fixes for handling interfaces with 
> no-link but I was not able to see it working in my setup. e.g. the host still 
> tries to send traffic to a interface with no link, effectively blackholing 
> the traffic (this was tested on a soekris box with if_vr(4))
>
> IMHO the whole RADIX_MPATH stuff is still in experimental stage and needs 
> some more work to work correctly.
>
> There is a recent thread about some improvements in RADIX_MPATH.
>
> Regards,
> Nikolay
>
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Re: 7-STABLE NFS: fatal: "select lock: Permission denied"

[Chuck Swiger]

On Apr 6, 2011, at 1:09 AM, per...@pluto.rain.com wrote:
>> People tend to take advantage of the resources they have; if you
>> have an EMC or NetApp filer handy, it's might well be reasonable
>> to use it ...
> 
> s/reasonable/tempting/
> 
> "When the only tool you have is a hammer, every problem tends to resemble a 
> nail."

Well, even junior sysadmins ought to learn something about percussive 
maintenance.  Senior sysadmins and network managers need to learn something 
about budgets and working with the equipment which is actually available or can 
be obtained under the current circumstances aka financial constraints.

Regards,
-- 
-Chuck

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Re: Multiple gateways support

[J. Hellenthal]

Hmmm funny, seems the mailing list is now stripping my address and
moving posts to the top.

On Wed, Apr 06, 2011 at 06:15:19PM +0200, K. Macy wrote:
> The weights of the links can be changed at run time. If one link is
> not passing traffic its weight should be set to zero until such time
> as it is passing traffic again.
> 
> On Wed, Apr 6, 2011 at 6:13 PM, Nikolay Denev  wrote:
> > On Apr 6, 2011, at 5:36 PM, Michael Proto wrote:
> >
> >> On Wed, Apr 6, 2011 at 8:02 AM, J. Hellenthal  wrote:
> >>> On Wed, Apr 06, 2011 at 01:45:54PM +0400, Eir Nym wrote:
>  On 1 April 2011 21:27, Baginski Darren  wrote:
> > Hi!
> >
> > Could please someone tell me about current state of multiple gw 
> > capabilities of FreeBSD?
> > I have dual homed FreeBSD box, one interface ISP1 another ISP2 :
> > 1) can I balance outgoing traffic across them ?
> > 2) Is there support of any kind dead gateway detection?
> > 3) Can I install multiple routes to the same network (with same and 
> > with different wight)? If yes how it behaves with one link failure, in 
> > particular if interface is down?
> >
> >>>
> >>> From what you said here it seems that your looking for lagg(4) with
> >>> configured with the loadbalance option. Give this man page [1] a
> >>> thorough read and youll probably see what your looking for.
> >>>
> >>> 1) http://www.freebsd.org/cgi/man.cgi?query=lagg
> >>>
> >>>
> 
>  about multiply GWs: you can set multiply gw via setfib(1) utility and
>  use fib in your firewall rules. But it is not very handy with DHCP and
>  rc(8) (setfib is located in /usr/bin and can't be used in /etc/rc.d).
>  Due to this I have to add another FreeBSD box to handle dynamic
>  routes.
> 
>  This is the one thing I know which can I do in linux easily and in
>  freebsd with hacks.
> >>>
> >>> --
> >>>
> >>> �Regards,
> >>>
> >>> �J. Hellenthal
> >>> �JJH48-ARIN
> >>> �0x89D8547E
> >>>
> >>>
> >>
> >>
> >> I don't think lagg(4) will work here, as its designed for two
> >> interfaces that are attached to the same network (see the example in
> >> the man page). For two different ISPs, I think the setfib approach is
> >> probably the way to go.
> >>
> >>
> >> -Proto
> >>
> >
> > Actually I think the OP is asking about the "options RADIX_MPATH" feature.
> >
> > 1) Yes, It can balance over the two links but only using Modulo-N Hash 
> > (RFC2991) algorithm, and probably you should setup NAT on both links.
> > 2) AFAIK there is no dead gw detection code yet.
> > 3) Yes you can do that. There were some fixes for handling interfaces with 
> > no-link but I was not able to see it working in my setup. e.g. the host 
> > still tries to send traffic to a interface with no link, effectively 
> > blackholing the traffic (this was tested on a soekris box with if_vr(4))
> >
> > IMHO the whole RADIX_MPATH stuff is still in experimental stage and needs 
> > some more work to work correctly.
> >
> > There is a recent thread about some improvements in RADIX_MPATH.
> >
> > Regards,
> > Nikolay
> >
> > ___
> > freebsd-net@freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-net
> > To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
> >
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-- 

  Regards,

  J. Hellenthal
  JJH48-ARIN
  0x89D8547E

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Re: Multiple gateways support

[K. Macy]

Uhm  ... what was the intended content of your message?

And ... the RADIX_MPATH code is now considerably more flexible than just ECMP.


-Kip

On Wed, Apr 6, 2011 at 8:10 PM, J. Hellenthal  wrote:
> Hmmm funny, seems the mailing list is now stripping my address and
> moving posts to the top.
>
> On Wed, Apr 06, 2011 at 06:15:19PM +0200, K. Macy wrote:
>> The weights of the links can be changed at run time. If one link is
>> not passing traffic its weight should be set to zero until such time
>> as it is passing traffic again.
>>
>> On Wed, Apr 6, 2011 at 6:13 PM, Nikolay Denev  wrote:
>> > On Apr 6, 2011, at 5:36 PM, Michael Proto wrote:
>> >
>> >> On Wed, Apr 6, 2011 at 8:02 AM, J. Hellenthal  wrote:
>> >>> On Wed, Apr 06, 2011 at 01:45:54PM +0400, Eir Nym wrote:
>>  On 1 April 2011 21:27, Baginski Darren  wrote:
>> > Hi!
>> >
>> > Could please someone tell me about current state of multiple gw 
>> > capabilities of FreeBSD?
>> > I have dual homed FreeBSD box, one interface ISP1 another ISP2 :
>> > 1) can I balance outgoing traffic across them ?
>> > 2) Is there support of any kind dead gateway detection?
>> > 3) Can I install multiple routes to the same network (with same and 
>> > with different wight)? If yes how it behaves with one link failure, in 
>> > particular if interface is down?
>> >
>> >>>
>> >>> From what you said here it seems that your looking for lagg(4) with
>> >>> configured with the loadbalance option. Give this man page [1] a
>> >>> thorough read and youll probably see what your looking for.
>> >>>
>> >>> 1) http://www.freebsd.org/cgi/man.cgi?query=lagg
>> >>>
>> >>>
>> 
>>  about multiply GWs: you can set multiply gw via setfib(1) utility and
>>  use fib in your firewall rules. But it is not very handy with DHCP and
>>  rc(8) (setfib is located in /usr/bin and can't be used in /etc/rc.d).
>>  Due to this I have to add another FreeBSD box to handle dynamic
>>  routes.
>> 
>>  This is the one thing I know which can I do in linux easily and in
>>  freebsd with hacks.
>> >>>
>> >>> --
>> >>>
>> >>>  Regards,
>> >>>
>> >>>  J. Hellenthal
>> >>>  JJH48-ARIN
>> >>>  0x89D8547E
>> >>>
>> >>>
>> >>
>> >>
>> >> I don't think lagg(4) will work here, as its designed for two
>> >> interfaces that are attached to the same network (see the example in
>> >> the man page). For two different ISPs, I think the setfib approach is
>> >> probably the way to go.
>> >>
>> >>
>> >> -Proto
>> >>
>> >
>> > Actually I think the OP is asking about the "options RADIX_MPATH" feature.
>> >
>> > 1) Yes, It can balance over the two links but only using Modulo-N Hash 
>> > (RFC2991) algorithm, and probably you should setup NAT on both links.
>> > 2) AFAIK there is no dead gw detection code yet.
>> > 3) Yes you can do that. There were some fixes for handling interfaces with 
>> > no-link but I was not able to see it working in my setup. e.g. the host 
>> > still tries to send traffic to a interface with no link, effectively 
>> > blackholing the traffic (this was tested on a soekris box with if_vr(4))
>> >
>> > IMHO the whole RADIX_MPATH stuff is still in experimental stage and needs 
>> > some more work to work correctly.
>> >
>> > There is a recent thread about some improvements in RADIX_MPATH.
>> >
>> > Regards,
>> > Nikolay
>> >
>> > ___
>> > freebsd-net@freebsd.org mailing list
>> > http://lists.freebsd.org/mailman/listinfo/freebsd-net
>> > To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
>> >
>> ___
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>
> --
>
>  Regards,
>
>  J. Hellenthal
>  JJH48-ARIN
>  0x89D8547E
>
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>
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Re: kern/156226: [lagg]: failover does not announce the failover to switch

[remko]

Old Synopsis: Lagg failover does not announce the failover to switch
New Synopsis: [lagg]: failover does not announce the failover to switch

Responsible-Changed-From-To: freebsd-bugs->freebsd-net
Responsible-Changed-By: remko
Responsible-Changed-When: Wed Apr 6 20:38:58 UTC 2011
Responsible-Changed-Why: 
Reassign to -net

http://www.freebsd.org/cgi/query-pr.cgi?pr=156226
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ip_forward / ip_output / RTFREE?

[Ingo Flaschberger]

Hi,

in sys/netinet/ip_output.c at the end of ip_output:
done:
if (ro == &iproute && ro->ro_rt && !nortfree) {
RTFREE(ro->ro_rt);
}
ro->ro_rt gets freed, if not from flowtable.

but in sys/netinet/ip_input.c, ip_forward after ip_output is called:
error = ip_output(m, NULL, &ro, IP_FORWARDING, NULL, NULL);

if (error == EMSGSIZE && ro.ro_rt)
mtu = ro.ro_rt->rt_rmx.rmx_mtu;
if (ro.ro_rt)
RTFREE(ro.ro_rt);

first the mtu is saved an the it will be freed.

so:
*) double free? - mtu could be invalid?
*) could also free a flowtable entry?


Mit freundlichen Gruessen,
Ingo Flaschberger

Geschaeftsleitung

crossip communications gmbh
A-1020 Wien, Sebastian Kneipp Gasse 1/3

Sitz der Gesellschaft: 1020 Wien, Oesterreich
Firmenbuchgericht: Handelsgericht Wien, FN 269698 s,
Umsatzsteueridentifikationsnummer (UID): ATU62080367

Haftungsausschluss / Disclaimer 
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Re: ip_forward / ip_output / RTFREE?

[Ingo Flaschberger]

Hi,

"wrong" alert - found the answer by myself.

Bye,
Ingo

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IPv6 neighbor discovery bug in HEAD

[Pierre Beyssac]

Hello,

It looks like IPv6 neighbor discovery, due to recent changes, doesn't
work correctly for me on HEAD.

I don't fully understand the nature of the problem (which obviously
results in connectivity problems with neighboring hosts), but the
most obvious symptom is missing ethernet addresses in Neighbor
Advertisement packets (which might come from interpreting a "MAY
be omitted" in RFC 2461 7.2.4 as a MUST), perhaps because the sending
code wrongly assumes the receiving end already has knowledge of the
ethernet address that's being looked-up.

I only have 1 -current machine so I can only say that the bug may
be triggered by it having multiple IPv6 addresses used for jails,
as below:

re0: flags=8843 metric 0 mtu 1500

options=389b
ether 00:1c:c0:c3:40:e9
inet 193.56.58.97 netmask 0xfff0 broadcast 193.56.58.111
inet6 fe80::21c:c0ff:fec3:40e9%re0 prefixlen 64 scopeid 0x1 
inet6 2a01:e35:8b50:2c40::2 prefixlen 64 
inet 192.168.0.2 netmask 0xff00 broadcast 192.168.0.255
inet 192.168.0.4 netmask 0x broadcast 192.168.0.4
inet6 2a01:e35:8b50:2c40::4 prefixlen 128 
inet 192.168.0.3 netmask 0x broadcast 192.168.0.3
inet6 2a01:e35:8b50:2c40::3 prefixlen 128 
inet 192.168.0.6 netmask 0x broadcast 192.168.0.6
inet6 2a01:e35:8b50:2c40::6 prefixlen 128 
nd6 options=21
media: Ethernet autoselect (1000baseT )
status: active

Example incomplete packet:

23:19:18.702622 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 24) 
2a01:e35:8b50:2c40::6 > 2a01:e35:8b50:2c40::7: [icmp6 sum ok] ICMP6, neighbor 
advertisement, length 24, tgt is 2a01:e35:8b50:2c40::4, Flags [router, 
solicited]

I've tried various tricks like forcing tlladdr to 1 in nd6_nbr.c,
to no avail...

Any help appreciated :-)
-- 
Sent from my FreeBSD server
Pierre Beyssac  p...@fasterix.frmug.org
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